SystemScreen

/**
 * Copyright jozefchutka ( http://wonderfl.net/user/jozefchutka )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/dzqE
 */

/*
more here:
http://blog.yoz.sk/2010/12/quick-tip-systemscreen-class/

Real device:    SystemScreen:
       24.0"           30.59"
        3.4"            3.67"
        
please fill in comment your results...
*/

package
{
    import flash.display.Sprite;
    import flash.display.StageAlign;
    import flash.display.StageScaleMode;
    import flash.text.TextField;

    [SWF(width="465", height="465", frameRate="30", backgroundColor="#FFFFFF")]
    public class WonderflApp extends Sprite
    {
        public function WonderflApp():void
        {
            stage.scaleMode = StageScaleMode.NO_SCALE;
            stage.align = StageAlign.TOP_LEFT;
            
            var tf:TextField = new TextField();
            tf.width = stage.stageWidth;
            tf.height = stage.stageHeight;
            tf.text = "";
            addChild(tf);
            
            tf.appendText("1 inch = " + 1 * SystemScreen.INCH_TO_CENTIMETERS + " centimeters\n");
            tf.appendText("1 inch = " + 1 * SystemScreen.INCH_TO_PIXELS + " pixels\n");
            tf.appendText("1 cm = " + 1 * SystemScreen.CENTIMETER_TO_INCHES + " inches\n");
            tf.appendText("1 cm = " + 1 * SystemScreen.CENTIMETER_TO_PIXELS + " pixels\n");
            tf.appendText("100 pixels = " + 100 * SystemScreen.PIXEL_TO_INCHES + " inches\n");
            tf.appendText("100 pixels = " + 100 * SystemScreen.PIXEL_TO_CENTIMETERS + " centimeters\n");
            tf.appendText("your screen = " + SystemScreen.SCREEN_SIZE_IN_PIXELS * SystemScreen.PIXEL_TO_INCHES + " inches\n");
            tf.appendText("your screen = " + SystemScreen.SCREEN_SIZE_IN_PIXELS * SystemScreen.PIXEL_TO_CENTIMETERS + " centimeters\n");
        }
    }
}

    import flash.system.Capabilities;

    class SystemScreen
    {
        public static const INCH_TO_CENTIMETERS:Number = 2.54;
        public static const INCH_TO_PIXELS:Number = Capabilities.screenDPI;
        
        public static const CENTIMETER_TO_INCHES:Number = 0.393700787;
        public static const CENTIMETER_TO_PIXELS:Number = Capabilities.screenDPI * 0.393700787;
        
        public static const PIXEL_TO_INCHES:Number = 1 / Capabilities.screenDPI;
        public static const PIXEL_TO_CENTIMETERS:Number = 2.54 / Capabilities.screenDPI;
        
        public static const SCREEN_SIZE_IN_PIXELS:Number = Math.sqrt(
            Capabilities.screenResolutionX * Capabilities.screenResolutionX +
            Capabilities.screenResolutionY * Capabilities.screenResolutionY);
        
        public function SystemScreen()
        {
        }
    }